申请人:Sumitomo Chemical Company, Limited
公开号:US06201131B1
公开(公告)日:2001-03-13
The present invention provides a safer and more efficient process for producing [2-(arylsulfonyl)ethenyl]benzene derivatives of the formula (3):
wherein R1, R2, R3 and R4 are the same or different and each independently represent a hydrogen, fluorine, or chlorine atom, a lower alkyl group, or the like, and two adjacent R3 and R4 may bond each other at their terminals to form a ring, which the process is characterized in that a 2-(arylsulfonyl)ethanol of formula (1):
wherein R1 and R2 are as defined above, and an acid anhydride are reacted in the presence of a base, and the reaction liquid obtained is supplied to a reaction with an aromatic halide of formula (2):
wherein X represents a chlorine, bromine, or iodine atom, and R3 and R4 are the same as defined above, in the presence of a palladium catalyst and a base.
本发明提供了一种更安全、更高效的生产式为(3)的[2-(芳基磺酰基)乙烯基]苯衍生物的方法,其中R1、R2、R3和R4相同或不同,每个独立地代表氢、氟或氯原子、较低的烷基或类似物,且相邻的R3和R4可以在它们的端部结合形成环,其特征在于在碱的存在下,通过反应式为(1)的2-(芳基磺酰基)乙醇(其中R1和R2如上所定义)和酸酐,得到反应液体,然后在钯催化剂和碱的存在下,将反应液体与式为(2)的芳香卤化物(其中X代表氯、溴或碘原子,R3和R4如上所定义)反应。